Process of soldering chain.



' ends of the wire of each link.

'nnirnn srarns PATENT o FroE.

CHARLES A. BECKER, or NEWARK, nnw JnnsEY. j

"rnocnss or sotnnnrns onnrn.

N0 Drawing.

This invention relates to the soldering'of" chain made from solder wireor wire having a core of solder, and the objectsof the 1nends of thewire in each link; to prevent any connection of adjacent links to, eachother by escaping solder; to prevent any solder adhering to the outersurface of the links or chain; to attain these results by a simpleprocess with few steps or operations; to secure a high grade product ofclean appearance, and to obtain otheradvantages and results as may bebrought out. in the following description.

In carrying out my invention chain formed from solder wire in thewell-known chain-making machines, which bend the links and connect themtogether with their joints between the ends of the wire open, is treatedwith a solution of boraX or other soldering salt, as by boiling it insuch a solution, and dried, so that the chain is covered with crystalsof the soldering salt. These crystals are afterward removed from theouter surface of the links by any suitable mechanical means, such asrubbing, but this leaves soldering salt crystals between the then heatedin a machine similar to a solder ing machine, but only to such a degreeof heat as will melt or fuse the soldering salt remaining in the jointsof the links, without causing the solder in the wire of which the linksare composed to run or soften for joining. This heating may cause moreor less surplus soldering salt to run out of the joint onto the outersurface of the links, however, and therefore after being thus heated thechain is again rubbed or subjected to mechanical means for removing thissoldering salt from the outer surface of its links, though withoutaffecting the soldering salt between the ends of the wire of each link.After this second treatment for .the removal of soldering salt, thechain is run through a soldering machine and the joints closed by theheat of the flame causing the solder to run or soften, as will beunderstood by those Specification of Letters Patent.

The chain is skilled in the art. It should be noted that when thisclosing is done the joint surfaces ofthe linksare coated with solderingsalt, while the rest of the surface of the links is devoid of i anysoldering salt whatever. Furthermore, the coating on the joint surfacesis uniform and even, and not too heavy, because allsurplus solderingsalt has been melted out by the second heating. I

g ,thus secure a very.cleanand perfect closure vention are to secure aperfect un on of the of the links.

Preferably the chain is rubbed with saw-' Patented Oct. 20, 1914.

Application filed June 20, 1913. Serial No. 774,781.

Having thus described the invention, what I claim is:

. 1. A process of soldering chain made from solder wire, consisting incoating the chain with a soldering salt, removing a portion of saidcoating, subjecting the chain to heat sufficient to melt the solderingsalt but insufficient to melt the solder, removing all soldering saltfrom the surface of the chain other than the joint surfaces of thelinks, and closing the joints by heating the chain.

2. A process of soldering chain made from solder wire, consisting incoating the chain with a soldering salt, mechanically removing a portionof said coating, subjecting the chain to heat sufficient to melt thesoldering salt but insufficient to melt the solder, me-

chanically removing all soldering salt from the surface of the chainother than the joint surfaces. of the links, and. closing the joints byheating the chain.

3. A process of soldering chain made from solder wire, consisting incoating the chain with a soldering salt, removing a portion of saidcoating, subjecting the chain to heat sufficient to melt the solderingsalt but insufficient to melt the solder, rubbing the chain to removeall soldering salt except from the-joint surfaces of the links, andclosing the joints by heating the chain.

l. The process of soldering chain links having solder cores, whichconsists in boiling the links in a solution of fusible flux,

removing the solvent of the flux adhering to the links, removing theflux adhering to the surfaces of the links, heating the links to atemperature at which the residual flux in the joints melts, removing theflux which issues from the oints by reason of the melting, and heatingthe links to the soldering temperature.

t5qThe process of soldering links having solder cores, which consists inboiling the links in a solution of fusible flux, evaporating the solventof the flux adhering to the links, removing the dry flux adhering to thesurfaces of the links, heating the links to a temperature at Which theresidual flux in the joints melts, removing the flux which issues fromthe joints by reason of the melt- Gopies of this patent may be obtainedfor ture.

CHARLES A. BECKER. Witnesses:

HOWARD P. KING, MILDRED E. BROOKS.

five cents each, by addressing the Commissioner of Iatents. Washington,D. G.

